It’s 8:40 and your child has requested a third glass of water. You have a number in your head for when they should be asleep. You’re less sure where that number came from, or whether it’s right.
Here it is, from CDC. Children ages 6 through 12 need 9 to 12 hours of sleep in a 24-hour period. Preschoolers need 10 to 13 hours, naps included. Those are ranges, and the width of them is the point.
Plenty of American children land outside the range. CDC, citing the National Survey of Children’s Health for 2020 and 2021, reports that 37% of children between 4 months and 5 years old weren’t getting enough sleep. Looked at by state, the share of children aged 4 months to 14 years who didn’t get enough ran from 25% in Minnesota to 50% in Louisiana.
A 25-point spread between two states is a useful fact to sit with. Sleep isn’t purely biology. It’s also schedules, work shifts, housing, siblings and habits, which means a meaningful part of it is reachable from inside your own house.
The hours, by age
CDC’s recommended amounts, from the top:
- Newborns, 0 to 3 months: 14 to 17 hours
- Infants, 4 to 12 months: 12 to 16 hours, including naps
- Toddlers, 1 to 2 years: 11 to 14 hours, including naps
- Preschoolers, 3 to 5 years: 10 to 13 hours, including naps
- School age, 6 to 12 years: 9 to 12 hours
Teenagers aged 13 to 17 need 8 to 10 hours, and adolescent sleep runs on a body clock that has genuinely shifted later. That’s a different problem with different solutions, and it has its own article in this library.
Where do these numbers come from? Not from one study. In 2016, a panel convened by the American Academy of Sleep Medicine published a consensus statement in the Journal of Clinical Sleep Medicine recommending sleep amounts for children and adolescents. They used a structured method in which experts rate options independently, see how the rest of the panel rated them, then rate again until the group converges.
Knowing that changes how you should use the numbers. A consensus range is expert judgment built on the available evidence, not a measurement taken off a machine. It tells you where most children in an age band belong. It doesn’t tell you what your particular child needs to the minute.
Which is why the ranges are so wide. A 7-year-old who sleeps nine and a half hours and bounces up is inside the range. So is one who needs eleven and a half. The practical test is whether mornings are a fight most days, and whether the late afternoon falls apart.
Why a routine works, in mechanism you can use
Three things are doing the work, and none of them is magic.
Prediction. The same sequence in the same order is a signal. By the third step, the body has already started getting ready, so falling asleep isn’t a cliff the child has to jump off.
Light. Bright light late in the evening pushes the internal clock later. Dimming the house in the final stretch is doing real work, not creating atmosphere.
Timing. A bedtime that slides by 90 minutes night to night asks a child’s system to guess. It guesses badly.
The evidence behind routines is better than you might assume. A 2015 study in the journal Sleep collected reports from mothers of 10,085 children aged 0 to 5 across 14 countries. Children with a consistent nightly bedtime routine went to bed earlier, fell asleep faster, woke less during the night and slept longer. Parents also reported fewer daytime behavior problems.
The finding that makes it practical is the dose response. More nights a week with a routine meant better outcomes, in a steady gradient, and starting the routine younger was associated with better results. That’s not all-or-nothing advice. Four nights a week beats two.
One caveat, stated plainly: the study was cross-sectional and based on parent reports, so it shows an association rather than proving the routine caused the improvement.
A 2018 review by the same lead researcher in Sleep Medicine Reviews sorted the useful parts of a bedtime routine into four kinds of activity: something to eat, hygiene such as a bath and teeth, communication such as reading or singing, and physical contact such as cuddling or rocking. The authors argue the benefits reach past sleep into language, literacy and emotional regulation, and they’re careful to say the mechanisms still need more research.
A routine you can run on a bad night
Pick four things. Do them in the same order every night.
- A hard stop. Screens off and out of the room at a fixed time. A visible kitchen timer works better than an announcement, because the timer is the one saying no.
- Something physical and calming. Bath, teeth, pajamas.
- Something verbal and connecting. A book, a song, three questions about the day.
- Lights down, and a one-line goodnight that’s the same every single night.
Keep the whole thing short enough that you can still do it when you’re exhausted and dinner ran late. A 45-minute routine that collapses twice a week is worse than a 20-minute routine that happens every night, because consistency is the active ingredient.
What breaks sleep in a real house
Devices in the bedroom
This is the big one, and the research has a detail that changes what you do about it.
A 2016 systematic review and meta-analysis in JAMA Pediatrics pooled 20 studies covering 125,198 children and teenagers aged 6 to 19. Children who used a phone or tablet at bedtime were about twice as likely to get inadequate sleep, and more than twice as likely to have excessive daytime sleepiness. The technical measure researchers use here is the odds ratio, which compares how common an outcome is in one group versus another. An odds ratio near 2 means roughly twice as common.
This is the part people don’t expect. Children who merely had a device in the room and did not report using it were still significantly more likely to sleep too little and to be sleepy the next day.
So the rule that follows isn’t turn it off. It’s take it out of the room. The charger lives in the kitchen.
Two honest limits on that evidence. All 20 studies were cross-sectional, which means they captured a snapshot and can’t establish that devices caused the poor sleep. And the average age in the pooled sample was 14.5, so the findings lean toward older children.
Caffeine, especially the kind nobody counts
CDC’s infant and toddler guidance says children under 24 months should avoid soft drinks, tea, coffee and sports drinks, and states that no safe caffeine limit has been established for young children.
For older children the problem is usually timing and invisibility. Iced tea at a restaurant. A cola at a birthday party at 5pm. Chocolate after dinner. Energy drinks marketed hard at middle schoolers. Caffeine sticks around for hours after it’s consumed, so a late-afternoon source can still be in play at bedtime. Any question about what amount is appropriate for your specific child goes to your pediatrician, not to a label.
Weekend drift
Saturday runs two hours late at both ends. Sunday night nobody is tired at the usual time. Monday morning is a disaster, and the week starts in a hole.
Holding wake time steadier across the week costs less than it sounds like, because wake time is the lever that moves bedtime. A child who gets up at roughly the same hour on Saturday is tired at roughly the same hour on Saturday night.
A room working against the child
CDC’s general sleep advice is a bedroom that’s quiet, relaxing and cool. Inspect the room at 9pm rather than at noon, when the problems are visible. Hallway light under the door. A street lamp through thin curtains. A radiator that cooks the room by midnight.
Worry at bedtime
Bedtime is the moment the day stops moving and a child’s thoughts catch up. Some bedtime worry is ordinary and passes.
The National Institute of Mental Health offers a threshold that’s genuinely useful for deciding when it isn’t ordinary: seek an evaluation when behaviors or emotions last weeks or longer, cause distress for the child or the family, or interfere with school, home life or friendships. NIMH lists sleep changes and nightmares among the signs to watch for in younger children. Children’s mental health is its own article here. For this one, the point is that persistent distress at bedtime is information, not misbehavior.
Night waking is normal, until it isn’t
Everyone surfaces briefly between sleep cycles, adults included. Adults roll over and don’t remember it in the morning. A young child who hasn’t yet learned to settle back down calls out instead.
That’s the ordinary version, and it’s developmentally expected in infants and toddlers. In the 10,085-child study, night wakings were common across the 0 to 5 range and tracked with how consistent the bedtime routine was.
So the question is whether the waking is brief and settles, or whether something else is driving it: pain, a new fear, a change at home, or the breathing problems described further down.
Sleep training is a choice, not a settled science
This is where parents receive the most confident advice backed by the thinnest evidence, from both directions.
Start with what the approaches are, since the labels get thrown around loosely.
- Graduated extinction. Putting the child down awake and checking on them at set intervals that get longer.
- Bedtime fading. Temporarily moving bedtime later to match when the child genuinely falls asleep, then shifting it earlier in small steps once sleep comes quickly.
- Parental presence, sometimes called camping out. Staying in the room and reducing your involvement gradually over successive nights.
- Doing none of it and waiting. This is also a choice, not a failure of nerve.
Now the trials. A 2016 randomized controlled trial in Pediatrics assigned 43 infants aged 6 to 16 months to graduated extinction, bedtime fading or a sleep-education control group. Both active approaches substantially cut the time it took infants to fall asleep. Graduated extinction also reduced the number of night wakings and the time spent awake after falling asleep. The researchers measured salivary cortisol, a stress hormone sampled from spit, and saw small to moderate declines in the active groups rather than increases. Twelve months later they found no differences between groups in parent-child attachment or in children’s emotional and behavioral problems.
A longer view comes from a 2012 study in Pediatrics that followed 326 Australian children to age 6, five years after a behavioral sleep program was delivered to parents of 7-month-olds with reported sleep problems. At the five-year mark the researchers found nothing on either side of the ledger: no differences in mental health, sleep, child-parent closeness or conflict, attachment, or parent depression and anxiety. Their conclusion, in their own words: “Behavioral sleep techniques have no marked long-lasting effects (positive or negative).”
How to read all that honestly. Two statements are supported at once. First, these techniques produce real short-to-medium-term improvements for families who use them. Second, the long-term harms that worry many parents have not shown up in follow-up research.
What the evidence does not support is telling any family there’s one correct method. The trials are small, 43 infants in one case. They recruited families who already reported a problem and wanted help, which isn’t every family.
The practical version: if an approach makes a parent feel physically ill to carry out, that matters, and other approaches exist. If a family uses graduated extinction and it works, the follow-up data gives no reason to believe they damaged anything.
Infant safe sleep is a separate and serious subject
Everything above is about helping a child sleep well. Safe infant sleep is a different question, about reducing the risk of sudden infant death and other sleep-related deaths, and it deserves to be read at the source rather than summarized by anyone.
The Safe to Sleep campaign, run by the National Institute of Child Health and Human Development, carries recommendations drawn from the American Academy of Pediatrics task force on sudden infant death. The core is short. Babies go on their backs for every sleep, naps included, until their first birthday, and that includes babies born preterm and babies with reflux. The sleep surface is firm, flat and level, in a crib, bassinet or play yard meeting federal safety standards, covered only by a fitted sheet. Nothing else belongs in the space: no pillows, no bumpers, no loose blankets, no stuffed animals, no positioners, no weighted sleep products. Share a room without sharing a bed for at least the first six months. Car seats, swings and carriers aren’t sleep spaces, so once you’re out of the car, move the baby to a flat surface. Safe to Sleep also states directly that no product can prevent SIDS, and that home heart, breathing and motion monitors are not effective at detecting or preventing it.
That’s a summary, not the full guidance. Read it at safetosleep.nichd.nih.gov, which also covers pacifiers, overheating, smoke-free environments, when to stop swaddling, and supervised tummy time while the baby is awake.
When a sleep problem is a medical problem
Some sleep trouble isn’t about routines at all. The signs that point toward sleep-disordered breathing are specific:
- Loud snoring on most nights
- Pauses in breathing, gasping, or choking sounds during sleep
- Mouth breathing while asleep
- Restless sleep, odd sleeping positions, heavy night sweating
- Persistent daytime sleepiness even when the child has had enough time in bed
- New problems with attention, mood or behavior that appeared alongside the snoring
A child who is struggling to breathe while awake, or who looks blue around the lips, is a 911 call, not an appointment.
The American Academy of Pediatrics published a clinical practice guideline on childhood obstructive sleep apnea in the journal Pediatrics, and its first recommendation is blunt: every child and adolescent should be screened for snoring. If a child snores and has other symptoms, the guideline directs clinicians to polysomnography, an overnight sleep study that records breathing, oxygen levels, heart rate and brain activity while the child sleeps. When enlarged tonsils and adenoids are blocking the airway, the guideline names surgery to remove them as the first-line treatment, with continuous positive airway pressure as the option if surgery isn’t performed or symptoms continue afterward.
How common is this? Less settled than you’d hope. A 2023 systematic review in Sleep Medicine Reviews examined 30 population studies of preschool-aged children and found the methods varied so widely that a single prevalence number isn’t credible. Questionnaire-based studies published since 2016 reported figures in the range of roughly 13% to 20%, while the small number of studies that confirmed diagnoses with objective testing produced considerably lower numbers. The honest takeaway isn’t a percentage. It’s that this is common enough that your pediatrician asks about snoring on purpose, and that an answer of yes, every night should get followed up.
What to bring to that appointment
Four things turn a vague worry into something a clinician can act on.
- Two weeks of rough notes. Bedtime, wake time, and how many nights you heard snoring.
- A 30-second phone video of your child asleep, taken from the doorway with the sound on.
- Whether anyone else in the family has sleep apnea.
- The daytime half of the story. Teacher comments, afternoon meltdowns, falling asleep in the car on short drives.
The video does more work than anything else on that list. A parent describing a breathing pause and a clinician hearing one are two different pieces of evidence.
The one thing to take away
If you change a single thing, change the timing rather than the content. A routine that starts at the same hour every night, Friday included, does more work than any individual activity inside it.
And stop aiming at an exact number of hours. CDC gives ranges because children differ. Watch the two signals that report on whether your child is getting enough: how hard mornings are, and how the late afternoon goes.
The exception is breathing. Loud snoring most nights, pauses in breathing, or daytime sleepiness that doesn’t improve when you fix the schedule isn’t a routine problem. Call the pediatrician, and bring the video.
Sources
- Centers for Disease Control and Prevention. “About Sleep.” cdc.gov
- Centers for Disease Control and Prevention. “Sleep Facts and Stats: Children.” cdc.gov
- Centers for Disease Control and Prevention. “Foods and Drinks to Avoid or Limit (Infant and Toddler Nutrition).” cdc.gov
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Safe to Sleep campaign. “Ways to Reduce Baby's Risk of SIDS and Other Sleep-Related Causes of Infant Death.” safetosleep.nichd.nih.gov
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Safe to Sleep campaign. “Safe Sleep Environment for Baby.” safetosleep.nichd.nih.gov
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Safe to Sleep campaign. “About Back Sleeping.” safetosleep.nichd.nih.gov
- National Institute of Mental Health. “Children and Mental Health: Is This Just a Stage?.” nimh.nih.gov
- PubMed. “Paruthi S, et al. "Recommended Amount of Sleep for Pediatric Populations: A Consensus Statement of the American Academy of Sleep Medicine." Journal of Clinical Sleep Medicine, 2016. DOI: 10.5664/jcsm.5866.” doi.org
- PubMed. “Mindell JA, Li AM, Sadeh A, Kwon R, Goh DY. "Bedtime routines for young children: a dose-dependent association with sleep outcomes." Sleep, 2015. DOI: 10.5665/sleep.4662.” doi.org
- PubMed. “Mindell JA, Williamson AA. "Benefits of a bedtime routine in young children: Sleep, development, and beyond." Sleep Medicine Reviews, 2018. DOI: 10.1016/j.smrv.2017.10.007.” doi.org
- PubMed. “Carter B, Rees P, Hale L, Bhattacharjee D, Paradkar MS. "Association Between Portable Screen-Based Media Device Access or Use and Sleep Outcomes: A Systematic Review and Meta-analysis." JAMA Pediatrics, 2016. DOI: 10.1001/jamapediatrics.2016.2341.” doi.org
- PubMed. “Gradisar M, et al. "Behavioral Interventions for Infant Sleep Problems: A Randomized Controlled Trial." Pediatrics, 2016. DOI: 10.1542/peds.2015-1486.” doi.org
- PubMed. “Price AMH, Wake M, Ukoumunne OC, Hiscock H. "Five-year follow-up of harms and benefits of behavioral infant sleep intervention: randomized trial." Pediatrics, 2012. DOI: 10.1542/peds.2011-3467.” doi.org
- PubMed. “Marcus CL, et al. "Diagnosis and management of childhood obstructive sleep apnea syndrome." Pediatrics (American Academy of Pediatrics clinical practice guideline), 2012. DOI: 10.1542/peds.2012-1671.” doi.org
- PubMed. “Magnusdottir S, Hill EA. "Prevalence of obstructive sleep apnea (OSA) among preschool aged children in the general population: A systematic review." Sleep Medicine Reviews, 2023. DOI: 10.1016/j.smrv.2023.101871.” doi.org